Directional proximity detection

ABSTRACT

This disclosure concerns wearable and/or handheld mobile electronic devices and methods for directional proximity detection of other wearable and/or handheld mobile electronic devices. A first wearable and/or handheld mobile electronic device ( 1 ) for directional proximity detection comprises a signal transceiver configured for wireless communication, and a control unit for the wireless communication. The control unit is operatively connected to the signal transceiver and configured to receive at least one wireless signal from a second wearable and/or handheld mobile electronic device ( 2 ), calculate spatial information regarding the second wearable and/or hand-held mobile electronic device by means of the signal/-s transmitted from the second wearable and/or handheld mobile electronic device to the first wearable and/or handheld mobile electronic device, and configure a notification for the user of the first wearable and/or handheld mobile electronic device based on at least the spatial information regarding the second wearable and/or handheld mobile electronic device.

TECHNICAL FIELD

The present invention relates to wearable and/or handheld mobileelectronic devices and methods for directional proximity detection ofother wearable and/or handheld mobile electronic user devicescommunicating wirelessly.

BACKGROUND ART

In recent years, there has been a large interest in developingtechnology for determining the position of user devices. The mostcommonly used method is GPS (Global positioning system), in whichsatellites are used to obtain the position of a mobile device. However,this method is not suitable for indoor use since this causes thebuilding structure to obstruct the GPS signal and makes it unable toreach the mobile device. Furthermore, there is technology developed forindoor positioning using a stationary beacon device that enablespositioning by sending a signal that is able to reach the mobile devicesin the near surrounding of the beacon and thereby allowing the devicesto attain position information.

The present invention is aimed at providing improvements to thesetechnologies and to provide technology for proximity positioning ofmobile wireless devices without the need for a separate beacon or a GPSsignal.

SUMMARY OF THE INVENTION

With the above description in mind, then, an aspect of the presentinvention is to provide a wearable and/or handheld mobile electronicdevice for directional proximity detection of a second wearable and/orhandheld mobile electronic device and for presenting in the firstwearable and/or handheld mobile electronic device, information regardingthe second wearable and/or handheld mobile electronic device and tonotify a user of the first wearable and/or handheld mobile electronicdevice of the second wearable and/or handheld mobile electronic deviceand its whereabouts. The invention also provides a method for suchdirectional proximity detection.

These and further objects are achieved by a first wearable and/orhandheld mobile electronic device for directional proximity detection,comprising an antenna array operatively connected to a signaltransceiver configured for wireless communication, a control unitcomprising software and memory for the wireless communication, whereinthe control unit is operatively connected to the signal transceiver, andwherein the control unit is configured to receive, by means of theantenna array and the signal transceiver, at least one wireless signalfrom a second wearable and/or handheld mobile electronic device, and tocalculate spatial information regarding the second wearable and/orhandheld mobile electronic device by means of the signal/-s transmittedfrom the second wearable and/or handheld mobile electronic device to thefirst wearable and/or handheld mobile electronic device, and toconfigure a notification for the user of the first wearable and/orhandheld mobile electronic device based on at least the spatialinformation regarding the second wearable and/or handheld mobileelectronic device, and to notify the user of the first wearable and/orhandheld mobile electronic device of the second wearable and/orhand-held mobile electronic device. By providing a wearable and/orhandheld mobile electronic device according to the above, a user of thefirst wearable and/or handheld electronic device is able to be notifiedof the presence of the second wearable and/or handheld mobile electronicdevice, e.g. its whereabouts, such as a relative direction and bepresented with information regarding the second detected wearable and/orhandheld mobile electronic device. The form or type of notification maybe graphical, optical (rendering on a display, e.g. visors), haptic,tactile (in the form of vibrations), and/or audible (sounds in speakerof a smart phone or in ear phones), which notification may be onlyinformation of the identity of the other mobile device or of itsrelative direction and/or distance in a one-way communication or thestart of a two-way communication between the at least two devices.Hence, this notification may be realized in a very simple and quick wayto and for the user of the first wearable and/or handheld mobileelectronic device enabling the user to for example choose a desirableaction or the device may be predeterminately set to perform a certaindesirable action or switch on or off a certain function of the firstwearable and/or handheld mobile device. Furthermore, the direction canbe calculated with high accuracy without having to rely on satellites orexternal antennas i.e. the spatial information regarding the mobileelectronic device can be determined by the first wearable and/orhandheld mobile electronic device alone.

According to one aspect of the disclosure, it provides a first wearableand/or handheld mobile electronic device, wherein the first wearableand/or handheld mobile electronic device is a mobile phone. By providinga mobile phone according to the invention, the user of the mobile phonecan be notified with spatial information regarding a second wearableand/or handheld mobile electronic device. Furthermore, the user of themobile phone can easier be informed of the spatial information of otherwearable and/or handheld mobile electronic devices and receiveinformation regarding said other wearable and/or handheld mobileelectronic devices.

According to one further aspect of the disclosure, it provides a firstwearable and/or hand-held mobile electronic device, wherein the firstwearable and/or handheld mobile electronic device is a visor. Byproviding visors according to the invention the user of the visors canbe notified with spatial information regarding a second wearable and/orhandheld mobile electronic device. Furthermore, the user of the mobilephone can easier determine the spatial information of other wearableand/or handheld mobile electronic devices and receive informationregarding said other wearable and/or handheld mobile electronic devicesby enabling the information to be rendered in the view of the user ofthe visors.

According to another aspect of the disclosure, the antenna array of thefirst wearable and/or handheld mobile electronic device faces insubstantially the same direction as the user is facing. By providing awearable and/or handheld mobile electronic device with the antenna arrayfacing in substantially the same direction as the user is facing, otherwearable and/or handheld mobile electronic devices that are located inthe direction that the user of the first wearable and/or handheld mobileelectronic device is facing can be detected by the antenna array. Theaccuracy of the calculation of the spatial information of the otherwearable and/or handheld mobile electronic devices is improved and thenotifications can be made more accurate accordingly.

According to yet another aspect of the disclosure, a first wearableand/or handheld mobile electronic device is provided, wherein theantenna array is arranged to receive signals originating from the secondwearable and/or handheld mobile electronic device in the front view ofthe user. By providing a wearable and/or handheld mobile electronicdevice in which the antenna array is arranged to receive signalsoriginating from the second wearable and/or handheld mobile electronicdevice in the front view of the user, other wearable and/or handheldmobile electronic devices that are located in the front view of thefirst wearable and/or handheld mobile electronic device can be detected.

According to a further aspect of the disclosure, a first wearable and/orhandheld mobile electronic device is provided, wherein the antenna arrayfaces a direction being substantially perpendicular to the direction theuser is facing. By providing an antenna array that faces in directionperpendicular to the direction the user is facing, the antenna array candetect and notify the user of the other wearable and/or handheld mobileelectronic devices that are located to either side of the user.

According to yet another aspect of the disclosure, a wearable and/orhandheld mobile electronic device is provided, wherein the antenna arrayfaces in a direction being substantially opposite the direction the useris facing. By providing a wearable and/or handheld mobile electronicdevice, e.g. visors, in which the antenna array faces in a directionbeing substantially opposite the direction the user is facing, i.e. inthe rear view of the user, other wearable and/or handheld mobileelectronic devices that are located at the rear view of the wearableand/or handheld mobile electronic device can be detected.

According to another aspect of the disclosure, a first wearable and/orhandheld mobile electronic device is provided, wherein the antenna arrayis arranged to receive signals originating from the second wearableand/or handheld mobile electronic device located at the rear of theuser. By providing a wearable and/or handheld mobile electronic device,e.g. visors, in which the antenna array is arranged to receive signalsoriginating from the second wearable and/or hand-held mobile electronicdevice located at the rear of the user, i.e. in the rear view of theuser, other wearable and/or handheld mobile electronic devices that arelocated at the rear of the first wearable and/or handheld mobileelectronic device can be detected.

According to one aspect of the disclosure, a first wearable and/orhandheld mobile electronic device is provided, wherein at least oneantenna array is arranged on the visor substantially in parallel or inparallel with the sidepieces/bows of the visor. By providing a wearableand/or hand-held mobile electronic device, e.g. visors, in which atleast one antenna array is arranged on the visor substantially inparallel with or in parallel with the sidepieces/bows of the visor,spatial information comprising distance and direction of other wearableand/or handheld mobile electronic devices around the first wearableand/or handheld mobile electronic device can be detected.

According to a further aspect of the disclosure, a first wearable and/orhandheld mobile electronic device is provided, wherein at least oneantenna array is arranged on the visor substantially vertically orvertically in relation to the longitudinal direction of thesidepieces/bows of the visor. By providing a wearable and/or handheldmobile electronic device, e.g. visors, in which at least one antennaarray is arranged on the visor substantially vertically or vertically inrelation to the longitudinal direction of the sidepieces/bows of thevisor, the vertical position and height of other wearable and/orhandheld mobile electronic devices around the first wearable and/orhandheld mobile electronic device can be detected.

According to one further aspect of the disclosure, it provides a firstwearable and/or hand-held mobile electronic device, wherein at least oneantenna array is arranged on the visor substantially in parallel or inparallel with the sidepieces/bows of the visor and at least one antennaarray is arranged on the visor substantially vertically or vertically inrelation to the longitudinal direction of the sidepieces/bows of thevisor. By providing a wearable and/or handheld mobile electronic device,e.g. visors, in which at least one antenna array is arrangedsubstantially in parallel or in parallel with the sidepieces/bows of thevisor and at least one antenna array is arranged on the visorsubstantially vertically or vertically in relation to the longitudinaldirection of the sidepieces/bows of the visor, spatial informationcomprising distance and/or direction and/or vertical positions of otherwearable and/or handheld mobile electronic devices around the firstwearable and/or handheld mobile electronic device can be detected.

The above and further objects are achieved by a visor for directionalproximity detection, comprising an antenna array operatively connectedto a signal transceiver configured for wireless communication, and acontrol unit comprising software and memory for the wirelesscommunication, wherein the control unit is operatively connected to thesignal transceiver and configured to receive, by means of the antennaarray and the signal transceiver, at least one wireless signal from asecond handheld mobile electronic device; to calculate spatialinformation comprising distance and/or direction and/or verticalposition regarding the second handheld mobile electronic device by meansof the signal/-s transmitted from the second handheld mobile electronicdevice to the visor; to configure a notification for the user of thevisor based on at least the spatial information regarding the secondhandheld mobile electronic device, and to notify the user of the visorof the second handheld mobile electronic device.

According to yet another aspect of the disclosure, a first wearableand/or handheld mobile electronic device is provided, wherein the firstwearable and/or handheld mobile electronic device is a wirelesshands-free device. By providing a wireless hands-free wearable and/orhand-held device according to the invention, the user can be notified ofother detected wearable and/or handheld mobile electronic deviceswithout having to have his wearable and/or handheld mobile electronicdevice, such as a mobile phone at hand, e.g. by not having to hold themobile phone and not having to fumble it out of his bag or briefcasewhen notified. The wireless hands-free device may be adapted to,independent of a mobile electronic device, retrieve informationregarding the detected mobile electronic device and notify the user ofthe wireless hands-free device. The wireless hands-free device may alsotransmit the information, i.e. a unique ID of a detected mobileelectronic device, to the mobile electronic device which is connected tothe wireless hands-free device in order for the mobile electronic deviceto retrieve the information regarding the detected mobile electronicdevice.

The above and further objects are also achieved by a method fordirectional proximity detection, comprising at least one wearable and/orhandheld mobile electronic device adapted to communicate wirelessly, themethod comprises receiving, by means of a first wearable and/or handheldmobile electronic device, at least one wireless signal from a secondwearable and/or handheld mobile electronic device by means of an antennaarray on the first wearable and/or handheld mobile electronic device;and calculating, by means of the first wearable and/or hand-held mobileelectronic device, spatial information regarding the second wearableand/or hand-held mobile electronic device by means of the signal/-stransmitted from the second wearable and/or handheld mobile electronicdevice to the first wearable and/or handheld mobile electronic device;and configuring a notification for the user of the first wearable and/orhandheld mobile electronic device based on at least the spatialinformation regarding the second wearable and/or handheld mobileelectronic device; and notifying the user of the first wearable and/orhandheld mobile electronic device of the second wearable and/or handheldmobile electronic device, e.g. its whereabouts. By providing a wearableand/or handheld mobile electronic device according to the above, a userof the first wearable and/or handheld mobile electronic device is ableto be notified of the presence of the second wearable and/or handheldmobile electronic device, e.g. its whereabouts, such as a relativedirection and be presented with information regarding the secondwearable and/or handheld detected mobile electronic device. The form ortype of notification may be graphical, optical (rendering on a display,e.g. visors), haptic, tactile (in the form of vibrations), and/oraudible (sounds in speaker of a smart phone or in ear phones), whichnotification may be only information of the identity of the otherwearable and/or handheld mobile device or of its relative directionand/or distance in a one-way communication or the start of a two-waycommunication between the at least two wearable and/or handheld mobiledevices. Hence, this notification may be realized in a very simple andquick way to and for the user of the first wearable and/or handheldmobile electronic device enabling the user to for example choose adesirable action or the device may be predeterminately set to perform acertain desirable action or switch on or off a certain function of thefirst wearable and/or handheld mobile device. Furthermore, the directioncan be calculated with high accuracy without having to rely onsatellites or external antennas i.e. the spatial information regardingthe wearable and/or handheld mobile electronic device can be determinedby the first wearable and/or handheld mobile electronic device alone.

The above are also achieved by below aspects of the invention, andfurther objects and features will appear from the following detaileddescription of aspects of the invention.

According to another aspect of the disclosure, it provides a method fordirectional proximity detection, wherein the first wearable and/orhandheld mobile electronic device determines a unique ID for the secondwearable and/or handheld mobile electronic device by means of thesignal/-s transmitted from the second wearable and/or handheld mobileelectronic device to the first wearable and/or handheld mobileelectronic device. By providing a method for determining a unique ID forthe second wearable and/or handheld mobile electronic device, the firstwearable and/or handheld mobile electronic device can identify andretrieve information regarding said second wearable and/or handheldmobile electronic device. Furthermore, the spatial information that iscalculated can be coupled to corresponding unique ID to ensure correctnotification of information to the user of the first wearable and/orhandheld mobile electronic device.

According to a further aspect of the disclosure, it provides a methodfor directional proximity detection, wherein the first wearable and/orhandheld mobile electronic device uses the unique ID for the secondwearable and/or handheld mobile electronic device to retrieveinformation associated with the user of the second wearable and/orhandheld mobile electronic device. By providing a method for determininga unique ID, e.g. a BTMAC ID or other unique identifier, informationcoupled to the unique ID can be retrieved from a server by the firstwearable and/or handheld mobile electronic device and notified to a userof the first wearable and/or handheld mobile electronic device. Theinformation that is stored in the server in connection to the unique IDcan be altered by the user of the first wearable and/or handheld mobiledevice with corresponding unique ID such that that user can choose whatinformation that is retrievable by other wearable and/or handheld mobileelectronic devices.

According to yet another aspect of the disclosure, it provides a methodfor directional proximity detection, wherein the first wearable and/orhandheld mobile electronic device notifies the user of the firstwearable and/or handheld mobile electronic device of the identityinformation associated with the second wearable and/or handheld mobileelectronic device by the aid of the spatial information associated withthe second wearable and/or handheld mobile electronic device. Byproviding a method for using the spatial information to notify the userof the identity information regarding the user of the second wearableand/or handheld mobile electronic device, the notification can be mademore precise. For instance, if the second wearable and/or handheldmobile electronic device is detected at a certain direction in relationto the first wearable and/or handheld mobile electronic device, thenotification comprising identity information can be presented to theuser of the first wearable and/or handheld mobile electronic devicecorrespondingly to alert the user of the first wearable and/or handheldmobile electronic device of both the direction and the identityinformation regarding the second wearable and/or handheld mobileelectronic device simultaneously.

According to yet another aspect of the disclosure, it provides a methodfor directional proximity detection, wherein the first wearable and/orhandheld mobile electronic device notifies the user of the firstwearable and/or handheld mobile electronic device by means of renderingan overlay at a position on a display, which position is determined byusing the spatial information associated with the second wearable and/orhandheld mobile electronic device. By providing a method for rendering avisual overlay which position is determined by using the spatialinformation associated with the second wearable and/or handheld mobileelectronic device, information can be accurately presented to the userof the first wearable and/or handheld mobile electronic device.Information can be rendered as an overlay in a position corresponding tothe position of the second wearable and/or handheld mobile electronicdevice as viewed through the first wearable and/or handheld mobileelectronic device e.g. as viewed through a pair of augmented realityvisors.

According to a further aspect of the disclosure, it provides a methodfor directional proximity detection, wherein the first wearable and/orhandheld mobile electronic device notifies the user of the firstwearable and/or handheld mobile electronic device by means of generatingan audio signal, which audio signal is determined by using the spatialand/or identity information associated with the second wearable and/orhandheld mobile electronic device. By providing a method for using anaudio signal as notification to a user of a first wearable and/orhandheld mobile electronic device, an effective way of notifying theuser of the spatial information such as the relative direction andidentity of the user carrying a second wearable and/or handheld mobileelectronic device. The audio signal can be sounding from a certaindirection corresponding to relative position of the second wearableand/or handheld mobile electronic device to indicate where the secondwearable and/or handheld mobile electronic device is located to the userof the first wearable and/or handheld mobile electronic device.

According to a further aspect of the disclosure, it provides a methodfor directional proximity detection, wherein the first wearable and/orhandheld mobile electronic device notifies the user of the firstwearable and/or handheld mobile electronic device by means ofcontrolling an audio stream by using the spatial information associatedwith the second wearable and/or handheld mobile electronic device. Byproviding a method for controlling an audio stream by using the spatialinformation associated with the second wearable and/or handheld mobileelectronic device can e.g. the audio stream from an ongoing conversationwith a user of the second wearable and/or handheld mobile electronicdevice be controlled such that the audio is generated in the firstwearable and/or handheld mobile electronic device corresponding to theposition of the second wearable and/or handheld mobile electronicdevice. Thereby can the user of the first wearable and/or handheldmobile electronic device in a simple way locate the direction to thesecond wearable and/or handheld mobile electronic device by listening towhich direction the audio, generated by the speaker system associatedwith the first wearable and/or handheld mobile electronic device, iscoming from.

According to another aspect of the disclosure, it provides a method fordirectional proximity detection, wherein the first wearable and/orhandheld mobile electronic device notifies the user of the firstwearable and/or handheld mobile electronic device by means of generatinga tactile signal, which tactile signal is determined by using thespatial and/or identity information associated with the second wearableand/or handheld mobile electronic device. By providing method for usinga tactile signal as a notification to the user of the first wearableand/or handheld mobile electronic device can be notified by only beingin contact with the first wearable and/or handheld mobile electronicdevice. The tactile signals may be varied depending on the spatialinformation, e.g. the relative position of the second wearable and/orhandheld mobile electronic device and the identity of the user of thesecond wearable and/or handheld mobile electronic device, e.g. emit asignal on one side of the first wearable and/or handheld mobileelectronic device that increases in strength as the second wearableand/or handheld mobile electronic device approaches the first wearableand/or handheld mobile electronic device and thereby giving the user ofthe first wearable and/or handheld electronic device informationregarding both the relative direction and the relative distance to thesecond wearable and/or handheld mobile electronic device.

According to a further aspect of the disclosure, it provides a methodfor directional proximity detection according to any preceding claim,wherein the first wearable and/or handheld mobile electronic devicetransmits the spatial information to the second wearable and/or handheldmobile electronic device. By providing a method for transmitting thespatial information calculated by the first wearable and/or handheldmobile electronic device regarding the second wearable and/or handheldmobile electronic device to the second wearable and/or handheld mobileelectronic device, the spatial information can be used by the secondwearable and/or handheld mobile electronic device to determine its ownlocation in relation to the first wearable and/or handheld mobileelectronic device.

According to a yet another aspect of the disclosure, it provides amethod for directional proximity detection, wherein the first wearableand/or handheld mobile electronic device notifies the user of the firstwearable and/or handheld mobile electronic device of the spatialinformation comprising the direction to the second wearable and/orhandheld mobile electronic device in relation to the first wearableand/or handheld mobile electronic device. By providing a method fornotifying the user of the first wearable and/or handheld mobileelectronic device of the direction of the second wearable and/orhandheld mobile electronic device, i.e. the relative direction comparedto the orientation of the first wearable and/or handheld mobileelectronic device, a way of making a user of the first wearable and/orhandheld mobile electronic device aware of the relative direction of thesecond wearable and/or handheld mobile electronic device is provided.

According to a yet another aspect of the disclosure, it provides amethod for directional proximity detection, wherein the first wearableand/or handheld mobile electronic device uses motion sensors tocompensate for movements and rotations of the antenna array during thereceiving and/or transmitting of at least one wireless signal. Tofurther enhance the precision of the direction detection, rotations andother movements of the antenna array during the transmitting and/orreceiving of a measurement signal package can be compensated for byusing accelerometer, gyro and/or magnetometer to detect such movements.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates a mobile electronic device where the presentinvention can be implemented.

FIGS. 2A and 2B illustrate mobile electronic devices where the presentinvention can be implemented.

FIG. 3 illustrates an exemplary application where the present inventionis implemented.

FIG. 4 illustrates a flowchart of a method according to the presentinvention for directional proximity detection of mobile electronicdevices by a mobile electronic device.

FIG. 5 illustrates an exemplary application of the present inventionwhere a first, tracking mobile electronic device in the shape ofaugmented reality visors detects a second, tracked mobile electronicdevice and is notified of certain identity parameters of the secondmobile electronic device as an overlay in the visors.

FIG. 6 illustrates an exemplary application of the invention where afirst, tracking mobile electronic device in the shape of a pair ofaugmented reality visors receives signal/-s from a second, trackedmobile electronic device in the shape of a mobile phone.

FIG. 7 illustrates an exemplary application of the invention where afirst, tracking mobile electronic device in the shape of a pair ofaugmented reality visors receives signal/-s from three other trackedmobile electronic devices in the shape of mobile phones and from threedifferent directions and/or positions, vertically and/or horizontally,and/or distances.

FIGS. 8 and 9 illustrate wearable and/or handheld mobile devices wherethe present invention is implemented.

It should be added that the following description of the embodiments isfor illustration purposes only and should not be interpreted as limitingthe disclosure exclusively to these embodiments/aspects.

DETAILED DESCRIPTION

Embodiments of the present invention will be described more fullyhereinafter with reference to the accompanying drawings, in whichembodiments of the invention are shown. This invention may, however, beembodied in many different forms and should not be construed as limitedto the embodiments set forth herein. Rather, these embodiments areprovided so that this disclosure will be thorough and complete, and willfully convey the scope of the invention to those skilled in the art.Like reference signs refer to like elements throughout.

FIG. 1 illustrates a mobile electronic device 1. Examples of suchdevices are mobile phones, glasses with integrated displays, augmentedreality visors, touch pads, a wireless handsfree device, e.g. aBluetooth headset or a “lifelogger” being able to take photos fordocumenting an every-day life for a user etc.

The first i.e. the tracking mobile electronic device 1 comprises anantenna array 10 according to the invention which includes a pluralityof antenna elements, preferably less than 10 elements, ideally 5-7elements which are separated with a predetermined distance, each beingable to receive and send a signal e.g. a Bluetooth signal, a low energyBluetooth signal, a WLAN signal etc. The antenna array 10 is operativelyconnected to a signal transceiver 13 to enable wireless communicationi.e. receive and send e.g. a Bluetooth signal, a WLAN signal etc. Theantenna array 10 is adapted to receive signals from and/or transmitsignals to at least one second mobile electronic device 2 that is to betracked by the first mobile electronic device 1 or vice versa, the firstmobile electronic device 1 is instead tracked by the second mobileelectronic device 2. The antenna array 10 may also transmit and/orreceive a switched signal, i.e. the active antenna segments are switchedat predetermined time intervals. The second, tracked mobile electronicdevice 2 comprises at least a regular wireless communication antennaand/or an antenna array 10 capable of transmitting and/or receivingsignals that is receivable by the antenna array 10 in the first,tracking mobile electronic device 1. The first mobile electronic 1device may also comprise a regular wireless communication antenna. InFIG. 7, a tracking wearable mobile electronic device 1 in the form ofvisors is in the detectable vicinity of three other mobile electronicdevices 2. One handheld second mobile electronic device 2 is in front ofthe user of the visors. Another handheld mobile electronic device 2 islocated essentially behind the user of the visors, i.e. this otherhand-held mobile electronic device 2 is placed in a direction beingsubstantially 180° to the direction in which the user of the visors isfacing, i.e. the other handheld mobile electronic device 2 may bearranged at the direction opposite the direction the visors 1 arefacing. This angle of direction between the first tracking wearablemobile electronic device 1 and the other rear handheld mobile electronicdevice/-s 2 may deviate from the direction in which the user is facingat angles between 45° and 180°. The third handheld mobile electronicdevice 2 is located essentially sideways/laterally of the user of thevisors, i.e. this third handheld mobile electronic device 2 is placed ina direction substantially perpendicular to the direction in which theuser of the visors is facing. Hence, the tracking wearable mobileelectronic device 1 according to the invention may detect other wearableand/or handheld mobile electronic devices 2 being located within anangle of 360° around it. The tracking wearable mobile electronic device1 according to the invention may detect other wearable and/or handheldmobile electronic devices 2 being located all around it. The trackingwearable mobile electronic device 1 according to the invention maydetect other wearable and/or handheld mobile electronic devices 2 beinglocated on all sides.

The characteristics and contents of the signals that is received by thedifferent antenna elements in the antenna array 10 is analyzed by acontrol unit 12 which further comprises software and a memory 18. Thecontrol unit 12 is operatively connected to the signal transceiver 13.The control unit 12 is adapted to calculate spatial informationregarding the second, tracked mobile electronic device 2. The spatialinformation may comprise the angle between the tracking mobileelectronic device 1 and the tracked mobile electronic device 2. Thecalculation of the relative angle is based on analyzing received I&Qsamples when a known signal is sequentially coupled to multiple transmitor receive antennas, which is a technique known in the art and will notbe described in further detail.

Furthermore, the angle that is detected can be combined with a relativedistance between the first mobile electronic device 1 and the secondmobile electronic device 2 that is determined by measuring the strengthof the signal from the second mobile electronic device 2 when receivedby the first mobile electronic device 1. The determined distance can beused to display a distance to the tracked mobile electronic device 2 insaid tracking mobile electronic device 1 or to determine the size of thedisplayed information regarding the tracked mobile electronic device 2.

The relative distance between the first mobile electronic device 1 andthe second mobile electronic device 2 may be determined by measuring thetime difference of arrival (TDOA) of the signal from the second mobileelectronic device 2 when received by the first mobile electronic device1. The determined distance can be used to display a distance to thetracked mobile electronic device 2 in said tracking mobile electronicdevice 1 or to determine the size of the displayed information regardingthe tracked mobile electronic device 2.

Furthermore, the relative distance between the first mobile electronicdevice 1 and the second mobile electronic device 2 may be determined bymeasuring the round trip time (RTT) of the signal from the second mobileelectronic device 2 when received by the first mobile electronic device1. The determined distance can be used to display a distance to thetracked mobile electronic device 2 in said tracking mobile electronicdevice 1 or to determine the size of the displayed information regardingthe tracked mobile electronic device 2.

The tracking mobile electronic device 1 is further adapted to notify theuser of the tracking mobile electronic device 1 of the presence of atleast one second mobile electronic device 2 in a predetermined way.

A first way of notifying a user of a tracking mobile electronic device 1that another mobile electronic device 2 is approaching is to use tactilesignaling, i.e. vibrations that are provided by at least one vibrationunit 16. The vibrations can occur when an approaching mobile electronicdevice 2 is detected. The vibrations can be directional, i.e. whenanother mobile electronic device 2 approach from a certain direction,the first, tracking mobile electronic device 1 vibrates on thecorresponding side facing the approaching, tracked mobile electronicdevice 2 to indicate the approach direction. The vibrations can alsooccur with different frequencies and sequences depending on if the e.g.the approaching mobile electronic device is a known device or not.

A second way of notifying a user of a tracking mobile electronic device1 that another mobile electronic device 2 is approaching is to use soundsignals that are provided by at least one speaker 14. The sound signalsoccur when an approaching device is detected. The sound signals can bedirectional, i.e. when another mobile electronic device approaches froma certain direction, the first, tracking mobile electronic device soundsa signal from a speaker on the corresponding side facing theapproaching, tracked mobile electronic device. The sound signal canfurther be different depending on the approaching, tracked mobileelectronic device 2, i.e. it can read out information regarding theapproaching mobile electronic device 2 or the user of said approachingdevice. The sound signals may be in the form of an audio signal orseveral audio signals or an audio stream. The method may control anaudio stream by using the spatial information associated with the secondmobile electronic device. Hence, the audio stream from an ongoingconversation with the user of a second mobile electronic device 2 can becontrolled such that the audio is generated in the first mobileelectronic device 1 corresponding to the position of the second mobileelectronic device 2. Thereby can the user of the first mobile electronicdevice 1 in a simple way locate the direction to the second mobileelectronic device 2 by listening to which direction the audio, generatedby the speaker system associated with the first mobile electronic device1, is coming from i.e. similar to a surround sound system.

A third way of notifying a user of a tracking mobile electronic device 1that another mobile electronic device 2 is approaching or is in thevicinity is to use visual notifications that are displayed/rendered on adisplay 15 of the tracking mobile electronic device 1. The visualnotifications occur when an approaching device 2 or a device 2 in thevicinity is tracked. The visual notifications can comprise a messagecontaining identification information regarding the tracked mobileelectronic device 2 or the user of the tracked mobile electronic device2. In a preferred embodiment, visual identification informationregarding the tracked mobile electronic device 2 is rendered as aoverlay in a position on a display 15 corresponding to the position thatthe tracked mobile device 2 has when viewed by a user through thetracking mobile electronic device 1 e.g. as viewed through a pair ofaugmented reality visors 1. The relative angle between the first,tracking mobile electronic device 1 and the second, tracked mobileelectronic device 2 that is calculated by the control unit 12 with useof the signals transmitted by the tracked mobile electronic device 2 isused to determine where to render the information regarding the trackedmobile electronic device 2. To further enhance the precision of therendering position and to ensure that the rendered information in theusers field of view follows the position of the tracked mobileelectronic device 2 when the relative angle between the two changes, agyroscope, a accelerometer and/or a magnetometer can be applied tocompensate the position of the rendering for movements of the trackingmobile electronic device 1. To achieve a high refresh rate of therendering of the information regarding the tracked device 2, theposition can be recalculated using the signals transmitted from thetracked device 2 and compensated according to the above. To furtherenhance the precision of the direction detection, rotations and othermovements of the antenna array 10 during the transmitting and/orreceiving of a measurement signal package can be compensated for byusing motion sensors 20 e.g. accelerometer, gyro and/or magnetometer todetect such movements.

FIGS. 2A and 2B show a mobile electronic device 1 in the shape of a pairof augmented reality visors 1, comprising means 15 for displayinginformation in the field of view of the user. The visors furthercomprises at least one antenna array 10 that is arranged in the frame ofthe visors 1 or integrated into the glass. For tracking mobileelectronic devices that are located in front of the tracking augmentedreality visors 1, the antenna array 10 is mounted on the part of theframe and/or glass facing forwards, e.g. essentially perpendicular tothe direction the visors are facing. For tracking of wearable and/orhandheld mobile electronic devices that are located to the side of thetracking visors 1, further antenna arrays 17 can be arranged on thesides of the frame, i.e. on the sidepieces of the visors (see FIG. 2A).Further antenna arrays 17 may be arranged substantially vertically orvertically on the frame, i.e. on the sidepieces of the visors and/or onthe middle part of the visor frame connecting the pair ofglasses/displays 15 together (see FIG. 2B). Further antenna arrays 17may be arranged substantially vertically or vertically on the frame,i.e. on the sidepieces of the visors at the back of the visor frame,i.e. at the part of the sidepieces that are placed behind the ears ofuser and/or at the users head and/or around the users head (see FIG.2B). The further arrays 17 may be arranged so that they follow thecontour and design of the frame and its sidepieces and middle pieces andpieces around the glasses, e.g. if the frame is bent and/or rounded, theantenna arrays may essentially follow the bends. The further arrays 17may partly follow the bends while partly extend essentially straightvertically and/or horizontally and/or inclined depending on the designof the visors.

The tracking first wearable mobile electronic device 1 according to theinvention may detect and identify other wearable and/or handheld mobileelectronic devices 2 and persons wearing and/or carrying these devicesin front of the user. The tracking first wearable mobile electronicdevice 1 according to the invention may detect and identify otherwearable and/or handheld mobile electronic devices 2 and persons wearingand/or carrying these devices in 360 degrees around the user of thefirst wearable mobile electronic device 1. This is achieved in that thefirst wearable mobile electronic device 1 comprises antenna arrays 10,17 being arranged at the front and sides of frames of visors. This isachieved in that the first wearable mobile electronic device 1 comprisesantenna arrays 10, 17 being arranged at the end of the frame and/orsidepieces of the visors at the back of the head or neck of the user andfacing backwards (see FIG. 8 at circles A and AA, and at the end of thevisors sidepieces in FIG. 9). To be able to use the antenna elements asan antenna array 10, 17 to determine direction, the distance d (seedistance d defined by arrows between the end pieces of the visors inFIG. 8) between the antenna elements 10, 17 must be known. This isaccomplished by making the frame and its side-pieces/bows of the visors1 hard enough so that they do not flex significantly and then measurethe angles a at the hinges of the frame at the glasses/displays 15 tocalculate the distance d (see FIG. 8, angle α at circles B and BB). Theangle a may be defined as the angle between the sidepieces of the visors1 when they are folded or in a first extreme predetermined position.This first extreme predetermined position may be when the sidepieces arefully deflected outwards, i.e. fully folded out (not in), to be put on ahead, until an end position of the hinged connection in one direction(se arrows O in FIG. 9 for the folding out direction). This firstextreme predetermined position may be defined as angle α=0° or 90° or anangle therebetween or even larger than 90°. Another extreme position maybe when the sidepieces are fully deflected inwards, i.e. fully folded in(not out), to be stored after removal from a head, until an end positionof the hinged connection in another direction (se arrows I in FIG. 9 forthe folding in direction). Another extreme position may be when thesidepieces are fully deflected inwards, i.e. fully folded in (not out),e.g. to be stored after removal from a head, until the ends of thesidepieces come into contact with the main frame with glasses/displays15 of the visors (se arrows I in FIG. 9 for the folding in direction).This other or second extreme predetermined position may be defined asangle α=180° or 90°. The distance d being zero may be defined by foldingthe sidepieces of the frame of the visors 1 together until their endsare in contact and register the angle a at this position being anintermediate position between the two extreme innermost and outermostpositions above. A user with a smaller head requiring the sidepieces tobe not fully folded out when wearing the visors 1 means that thedistance d between the antenna elements of the antenna array 10, 17 maybe calculated in relation to how much, in degrees, the actual angle athen deviates from the first extreme and predetermined position for thesidepieces, i.e. when fully folded out. This smaller distance d may alsobe calculated by reducing the maximum and predetermined distance d asmeasured in the fully folded out state of the visor sidepieces incorrespondence to the difference in degrees between the maximum andpredetermined angle α (at the fully folded out state of the side pieces)and the not as large angle a for the user with the smaller head whensidepieces are not fully folded out or in, i.e. when the sidepieces arein the intermediate position.

The tracking first wearable mobile electronic device 1 according to theinvention may detect and identify other wearable and/or handheld mobileelectronic devices 2 and persons wearing and/or carrying these devicesby comprising also vertical antenna arrays 17 on the front of theglasses 15 in addition to the horizontal ones 10 (see FIGS. 2B, 7 and atcircles C and CC in FIG. 9). This makes it possible to estimate theZ-axis direction to the other wearable and/or handheld mobile electronicdevices 2 and/or their users. This will make it possible to put theoverlay information in the glasses/displays 15 of the visors 1 on theright/correct height and hence ensure a proper overlay of the trackedobject/the other wearable and/or handheld mobile electronic device 2 aswell as the possibility to remove the overlay in case the user islooking up or down too much to keep the object/the other wearable and/orhandheld mobile electronic device 2 in sight. This also makes itpossible to differentiate different devices located on top of eachother. It will also be possible to combine this information with theaccelerometer data in the visors 1 (by means of earth gravity) to decideif the other wearable and/or handheld mobile electronic device 2 and/orits user is on the same height, above or below the visors 1 (andpresumably the head of the user). That information can among otherusages be used to better distinguish what kind of object is beingtracked by the visors 1.

FIG. 3 shows three wearable and/or handheld mobile electronic devices inthe form of augmented reality visors. Another example of wearable and/orhandheld mobile electronic devices is shown in FIG. 7 where the trackingwearable and/or handheld mobile electronic device 1 is a visor whilethree other wearable and/or handheld mobile electronic devices 2 are inthe form of mobile phones 2 at differing positions, vertically and/orhorizontally, different distances and different directions in relationto the tracking visors 1. The tracking device 1 receives signals fromthe tracked devices 2 enabling the tracking device 1 to locate thetracked devices 2. The signals further comprise a respective unique IDdepending on the standard used by the associated devices, e.g. an unit,Mac or device ID for the tracked devices, in this case a BTMAC ID butthis can be any type of unique network identifier. The units IDs arethen sent to a server 11 to retrieve public information that isconnected to the respective unit ID, by performing a lookup in a webregistry, and then a public source, e.g. the Facebook page of the userthat is connected to the unit ID (see the exemplary information inglass/display 15 of FIG. 5). The web registry maps unit IDS to publicIDs, e.g. the Facebook IDs of the users of the devices. The control unit12 can then determine where to render the retrieved information in thedisplay 15 of the visors 1 so that it becomes an overlay which isattached to the corresponding tracked wearable and/or handheld mobileelectronic device/-s 2. Face detection can further be used to improvethe accuracy of the rendering, i.e. to ensure that the positioning ofthe rendered information in the display 15 of the visors 1 does notobstruct the view of the user of the tracked device/-s 2.

FIG. 4 shows a flowchart of the method for notifying a user of atracking mobile electronic device 1 that tracked mobile electronicdevice/-s 2 is/are detected. The first step S1 of the method is toreceive at least one signal from a second wearable and/or handheldmobile electronic device 2 by means of at least one antenna array 10, 17on a first, tracking wearable and/or handheld mobile electronic device1.

The second step S2 of the method is to calculate, by means of a controlunit 12 in the first wearable and/or handheld mobile electronic device1, spatial information regarding the second wearable and/or handheldmobile electronic device 2 by means of the signal/-s transmitted fromthe second wearable and/or handheld mobile electronic device 2 to thefirst wearable and/or handheld mobile electronic device 1. The signal/-sthat is received from the second wearable and/or handheld mobileelectronic device 2 can comprise a unique unit ID. The control unit 12registers unit IDs and makes sure that the unit IDs are connected tocorresponding spatial information. The control unit 12 is adapted tocalculate spatial information that comprises the angle and/or distanceand/or the position, i.e. vertically and/or horizontally, to thetracked, second wearable and/or handheld mobile electronic device 2.

Step three, S3, comprises configuring a notification for the user of thefirst wearable and/or handheld mobile electronic device 1 based on atleast the spatial information regarding the second wearable and/orhandheld mobile electronic device 2. The control unit 12 can further beadapted to use the spatial information in combination with informationgathered from a server 11 using the unit ID of the second wearableand/or handheld mobile electronic device 2. The information that isgathered from the server is registered by the user of the secondwearable and/or handheld mobile electronic device 2 in advance;alternatively the information or some of the information may also begathered automatically by the server 11. The control unit 12 combinesthe information gathered from the server 11 with the correspondingspatial information and uses it to notify the user of the first,tracking wearable and/or handheld mobile electronic device 1 that asecond, tracked wearable and/or handheld mobile electronic device 2 isdetected or is in the vicinity. The notification can comprise adirectional vibration, a directional sound signal that can also becomprising information regarding the second, tracked wearable and/orhandheld mobile electronic device 2, or a visual, rendered overlay in aposition on a display 15 on the first device 1 corresponding to theposition of the second, tracked wearable and/or handheld mobileelectronic device 2 as seen through the first, tracking wearable and/orhandheld mobile electronic device 1 e.g. as seen through a pair ofvisors 1. The notification can also be a combination of thesealternatives.

Step four, S4, comprises notifying the user of the first, trackingwearable and/or handheld mobile electronic device 1 of the second,tracked wearable and/or handheld mobile electronic device 2 in apredetermined way. The predetermined way can be any of the alternativesabove or a combination of these.

FIG. 5 shows an exemplary application of the present invention where afirst wearable and/or handheld, tracking mobile electronic device 1 inthe form of augmented reality visors 1 detects/has detected a secondwearable and/or handheld, tracked mobile electronic device 2. Thesignals from the tracked device 2 are received by the antenna array 10,17 and the spatial information is calculated. The unit ID is used toretrieve the corresponding user information from the server 11 and thecontrol unit 12 in the tracking device 1 renders the information on theposition calculated by the control unit 12 in the tracking device 1using at least the spatial information. The process is repeated toensure that the information is rendered in the correct position and toensure that the information regarding the tracked device 2 is kept up todate. Face recognition, a gyroscope and accelerometers can be applied toimprove the accuracy of the rendering. The visors can also be connectedto another electronic device e.g. a wireless handsfree device viaBluetooth and thereby allow the connected device to be active in thenotification of the user e.g. by producing a sound signal or vibration.

FIG. 6 shows another exemplary application of the invention where afirst, tracking mobile electronic device 1 in the shape of a pair ofaugmented reality visors 1 receives signal/-s from a second, trackedmobile electronic device 2 in the shape of a mobile phone 2. Thetracking mobile electronic device 1 can, by analyzing the signals e.g.by calculating the Angle of Arrival, determine the angle in thehorizontal plane between the first tracking mobile electronic device 1and the tracked mobile electronic device 2. The technique of calculatingAngle of Arrival is known in the art and will not be described infurther detail. The array can also be positioned in another direction,e.g. vertically, to provide an angle in the vertical plane that can becombined with the angle in the horizontal plane to provide a threedimensional calculation of the position of the second wearable and/orhandheld, tracked mobile device 2 by the first wearable and/or handheld,tracking mobile electronic device 1 (see FIGS. 2B, 7, 8, and 9).

Another example of application of the invention is shown in FIG. 3, herea first, tracking wearable mobile electronic device 1 in the shape of apair of augmented reality visors 1 receives signal/-s from at least oneother tracked wearable mobile electronic device 2 in the shape of a pairof augmented reality visors. Yet another example of application of theinvention is shown in FIG. 3 where a first, tracking mobile electronicdevice 1 is in the shape of a pair of augmented reality visors 1 andreceives signal/-s from a second, tracked mobile electronic device 2 inthe shape of a second pair of augmented reality visors and a thirdtracked wearable mobile electronic device 2 in the shape of a third pairof augmented reality visors. Any or all of these visors in FIG. 3 maycomprise at least one antenna array 10 arranged on the visor 1, 2substantially in parallel or in parallel with the sidepieces of thevisor. Any or all of these visors in FIG. 3 may comprise at least oneantenna array 17 arranged substantially vertically or vertically inrelation to the longitudinal direction of the sidepieces/bows of thevisor. Alternatively, at least one of these visors in FIG. 3 maycomprise at least one antenna array 10 arranged on the visor 1, 2substantially in parallel or in parallel with the sidepieces of thevisor and at least one antenna array 17 arranged substantiallyvertically or vertically in relation to the longitudinal direction ofthe sidepieces/bows of the visor 1, 2. The invention also applies touser cases when the visors 1 are rotated around an axis substantially inparallel with or in parallel with the longitudinal axis of itssidepieces, i.e. when the visors are tilted and rotated sideways if theuser nods or moves his head to the side (not forwards). The inventionapplies to user cases when the visors 1 are rotated around an axissubstantially perpendicular to or perpendicular to the longitudinal axisof its sidepieces, i.e. when the visors are tilted forwards or backwardswhen the user nods forwards or backwards or moves his head whilerotating it forwards or backwards, e.g. when looking up or down. Theinvention also applies to user cases when the visors 1 are rotatedaround an axis substantially perpendicular to or perpendicular to thelongitudinal axis of its sidepieces and substantially vertical orvertical in relation to the horizontal plane, i.e. when the visors aretilted and rotated as the user turns his head to the left or right, e.g.when looking to the side.

1. A first wearable and/or handheld mobile electronic device (1) fordirectional proximity detection, comprising: an antenna arrayoperatively connected to a signal transceiver configured for wirelesscommunication, and a control unit comprising software and memory for thewireless communication, wherein the control unit is operativelyconnected to the signal transceiver, wherein the control unit isconfigured to receive, by means of the antenna array and the signaltransceiver, at least one wireless signal from a second wearable orhandheld mobile electronic device, calculate spatial informationregarding the second wearable or handheld mobile electronic device bymeans of the signal/-s transmitted from the second wearable or handheldmobile electronic device to the first wearable or handheld mobileelectronic device, configure a notification for the user of the firstwearable or handheld mobile electronic device based on at least thespatial information regarding the second wearable or handheld mobileelectronic device, and to notify the user of the first wearable orhandheld mobile electronic device of the second wearable or handheldmobile electronic device.
 2. A first wearable and/or handheld mobileelectronic device according to claim 1, wherein the first wearable orhandheld mobile electronic device is a mobile phone.
 3. A first wearableand/or handheld mobile electronic device according to claim 1, whereinthe first wearable or handheld mobile electronic device is a visor.
 4. Afirst wearable and/or handheld mobile electronic device according toclaim 3, wherein the antenna array faces in the substantially samedirection as the user is facing.
 5. A first wearable and/or handheldmobile electronic device according to claim 4, wherein the antenna arrayis arranged to receive signals originating from the second wearable orhandheld mobile electronic device in the front view of the user.
 6. Afirst wearable and/or handheld mobile electronic device according toclaim 3, wherein the antenna array faces a direction being substantiallyperpendicular to the direction the user is facing.
 7. A first wearableand/or handheld mobile electronic device according to claim 3, whereinthe antenna array faces in a direction being substantially opposite thedirection the user is facing.
 8. A first wearable and/or handheld mobileelectronic device according to claim 3, wherein the antenna array isarranged to receive signals originating from the second wearable orhandheld mobile electronic device located at the rear of the user.
 9. Afirst wearable and/or handheld mobile electronic device according toclaim 3, wherein at least one antenna array is arranged on the visorsubstantially in parallel with the sidepieces/bows of the visor.
 10. Afirst wearable or handheld mobile electronic device according to claim3, wherein at least one antenna array is arranged on the visorsubstantially vertically in relation to the longitudinal direction ofthe sidepieces/bows of the visor.
 11. A first wearable or handheldmobile electronic device according to claim 3, wherein at least oneantenna array is arranged on the visor substantially in parallel withthe sidepieces/bows of the visor and at least one antenna array isarranged on the visor substantially vertically in relation to thelongitudinal direction of the sidepieces/bows of the visor.
 12. A visorfor directional proximity detection, comprising: at least one antennaarray operatively connected to a signal transceiver configured forwireless communication, and a control unit comprising software andmemory for the wireless communication, wherein the control unit isoperatively connected to the signal transceiver, wherein the controlunit is configured to receive, by means of the antenna array and thesignal transceiver, at least one wireless signal from a second handheldmobile electronic device, calculate spatial information comprisingdistance and/or direction and/or vertical position regarding the secondhandheld mobile electronic device by means of the signal/-s transmittedfrom the second handheld mobile electronic device to the visor,configure a notification for the user of the visor based on at least thespatial information regarding the second handheld mobile electronicdevice, and to notify the user of the visor of the second handheldmobile electronic device.
 13. A method for directional proximitydetection, comprising at least one mobile wearable and/or handheldelectronic device adapted to communicate wirelessly, the methodcomprising: receiving, by means of a first wearable and/or handheldmobile electronic device, at least one wireless signal from a secondwearable and/or handheld mobile electronic device by means of an antennaarray on the first wearable or handheld mobile electronic device,calculating, by means of the first wearable or handheld mobileelectronic device, spatial information regarding the second wearable orhandheld mobile electronic device by means of the signal/-s transmittedfrom the second wearable or handheld mobile electronic device to thefirst wearable or handheld mobile electronic device, configuring anotification for the user of the first wearable or handheld mobileelectronic device based on at least the spatial information regardingthe second wearable or handheld mobile electronic device, and notifyingthe user of the first wearable or handheld mobile electronic device ofthe second wearable or handheld mobile electronic device.
 14. A methodfor directional proximity detection according to claim 13, wherein thefirst wearable or handheld mobile electronic device determines a uniqueID for the second wearable or handheld mobile electronic device by meansof the signal-s transmitted from the second wearable or handheld mobileelectronic device to the first wearable or handheld mobile electronicdevice.
 15. A method for directional proximity detection according toclaim 14, wherein the first wearable or handheld mobile electronicdevice uses the unique ID for the second wearable or handheld mobileelectronic device to retrieve information associated with the user ofthe second wearable or handheld mobile electronic device.
 16. A methodfor directional proximity detection according to claim 14, wherein thefirst wearable or handheld mobile electronic device notifies the user ofthe first wearable or handheld mobile electronic device of the identityinformation associated with the second wearable or handheld mobileelectronic device by the aid of the spatial information associated withthe second wearable or handheld mobile electronic device.
 17. A methodfor directional proximity detection according to claim 1, wherein thefirst wearable or handheld mobile electronic device notifies the user ofthe first wearable or handheld mobile electronic device by means ofrendering an overlay at a position on a display, which position isdetermined by using the spatial information associated with the secondwearable or handheld mobile electronic device.
 18. A method fordirectional proximity detection according to claim 1, wherein the firstwearable or handheld mobile electronic device notifies the user of thefirst wearable or handheld mobile electronic device by means ofgenerating an audio signal, which audio signal is determined by usingthe spatial and/or identity information associated with the secondwearable or handheld mobile electronic device.
 19. A method fordirectional proximity detection according to claim 1, wherein the firstwearable or handheld mobile electronic device notifies the user of thefirst wearable or handheld mobile electronic device by means ofcontrolling an audio stream by using the spatial information associatedwith the second wearable or handheld mobile electronic device.
 20. Amethod for directional proximity detection according to claim 1, whereinthe first wearable or handheld mobile electronic device notifies theuser of the first wearable or handheld mobile electronic device by meansof generating a tactile signal, which tactile signal is determined byusing the spatial and/or identity information associated with the secondwearable or handheld mobile electronic device.
 21. A method fordirectional proximity detection according to claim 1, wherein the firstwearable or handheld mobile electronic device transmits the spatialinformation to the second wearable or handheld mobile electronic device.22. A method for directional proximity detection according to claim 1,wherein the first wearable or handheld mobile electronic device notifiesthe user of the first wearable or handheld mobile electronic device ofthe spatial information comprising the direction to the second wearableor handheld mobile electronic device in relation to the first wearableor handheld mobile electronic device.
 23. A method for directionalproximity detection according to claim 1, wherein the first wearable orhandheld mobile electronic device uses motion sensors to compensate formovements and rotations of the antenna array during the receiving and/ortransmitting of at least one wireless signal.